Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 107 for “"state transition"”.
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Sequential partial adaptation of state transition matrices
"The problem of process control has several phases to its solution. The first phase involves finding either experimentally or theoretically a dynamic model which represents the process to be controlled. The second phase involves designing a control policy which when used on the chosen model will …
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Analyses and predictions of ultrasound interactions with model biomembrane systems via two-state transition model
… ultrasound interactions near to the lipid phase transition temperature. The enhanced ultrasound absorption spectra closely resemble single relaxation spectra, suggesting that the membrane constituents undergo a simple two-state transition. The temperature dependence of the relaxation frequency is …
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A New State Transition Model for Forecasting-Aided State Estimation for the Grid of the Future
… wind power, the randomness in power system state will increase to unprecedented levels. This dissertation proposes a new state transition model for power system forecasting-aided state estimation, which aims at capturing the increasing stochastic nature in the states of the grid of the …
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Message sequence chart specifications with cross verification
… written with Message Sequence Charts and State Transition Diagrams.;In this work an algorithm is proposed in which all conditional MSCs are transformed into an algebraic representations, Message Flow Graphs and by stepwise refinement, a Global State Transition Graph is created. This GSTG …
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Characterization of the phosphorylation of thylakoid membrane proteins from cyanobacterium synechococcus sp. PCC 6301 in light state 1 and light state 2
… PSI) of photosynthesis is regulated by the light state transition. Three models have been proposed for the mechanism of the state transition in phycobilisome (PBS) containing organisms, two involving protein phosphorylation. A procedure for the rapid isolation of thylakoid membranes and PBS …
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Transition dynamics between the multiple steady states in natural ventilation systems : from theories to applications in optimal controls
… this study, we investigated the multiple steady state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in numerical simulations and ventilation controls are presented. In a system with …
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Distributed analysis of Markov chains
… concurrent systems. The systems in question are state transition systems from which Markov chains can be derived. Both phases of the analysis pipeline are considered: state space generation from a state transition model to form the Markov chain and finding performance information by solving the …
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Interaction between respiratory carbon flow and photosynthetic light harvesting in the green alga, selenastrum minutum
… of the PQ(cyt b6f) pool would result in a state 1 to 2 transition which could poise the photosynthetic electron transport chain for a decrease in NADPH production. The purpose of the present study was to rigorously test the hypothesis that increased respiratory carbon flow, which increased …
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Circuit-oriented switch-mode integration routine for switching converters
… this program automatically generates state-space equations corresponding to each switching interval and performs time-domain simulations by using state-transition equations with a fast-convergence algorithm for topological changes.
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Goal-directed qualitative reasoning with partial states
… simulation (QS) to compute envisionments (i.e. state-transition graphs) representing all possible behaviors. Unfortunately, QS exhaustively case-splits on all choices, regardless of specific task goals. It reasons with completely described states and explores every (ambiguous) future of each.
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Single cell decisions in endothelial population in the context of inflammatory angiogenesis
… conceptual models to account for the different state transition patterns and how they are modulated in the presence of opposing inflammatory cytokines. The observed unique state transition patterns in the angiogenic endothelial cell population are consistent with one of these descriptions, the …
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Spectral-Timing Observations of Disk-Jet Coupling in Black Hole X-ray Binaries
… in which they exhibit different accretion states with distinct spectral-timing features, allowing us to study the accretion-ejection physics or disk-jet coupling in a single source on a human timescale. In MAXI J1820+070, I discover that the soft reverberation lag becomes longer during the …
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Dynamics and precursor signs for phase transitions in neural systems
This thesis investigates neural state transitions associated with sleep, seizure and anaesthesia. The aim is to address the question: How does a brain traverse the critical threshold between distinct cortical states, both healthy and pathological? Specifically we are interested in sub-threshold …
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Expert system usability: modeling and analysis of human- advisor interaction
… This type of interface is known as an advisor. A state transition model is used to represent human-advisor interaction. The model provides a mechanism by which to collect objective human performance data. In addition, it is used to specify human-advisor interaction metrics. To test the state …
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Identification of linear sampled data systems.
A least squares estimator is derived for the state transition matrix phi of a linear, stationary sampled data system operating in a stochastic environment. The estimator is shown to be unbiased and minimum variance under the condition of full observability of the state vector of the system. The …
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Conditional dynamics of non-Markovian, infinite-server queues
… points in time. More specifically, we define a state that incorporates partial information from the history of the process and write analytical formula for the dynamics of the system (state transition probabilities). Moreover, we develop an approximation method that makes the state …
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A novel reduced-complexity approach to hidden Markov modeling of two-dimensional processes with application to face recognition.
… to the computations of the probabilities of state transition and N is the number of states in the model. In this thesis, a low complexity high performance 2-D Hidden Markov Model (HMM) is proposed and is applied to the problem of Face Recognition. The proposed model is a true 2-D HMM. The …
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A study of the long-term behavior of galactic X-ray sources with RXTE
… are pursued on the discoveries I made in (1) the state transition and orbital modulation of the black hole candidate Cyg X-1; (2) a 4.4-d period in a previously poorly-known X-ray source X 1908+075; and (3) a 98-d period in another previously poorly known X-ray source XTE J1716-389. In Cyg X-1, I …
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Approximate Dynamic Programming with Parallel Stochastic Planning Operators
… policy is then derived by iteratively improving state value aggregation estimates attached to the operators using the P-SPOs as a model in a Dyna-Q-like architecture. Reinforcement learning and dynamic programming are powerful techniques for automated agent decision making in stochastic …
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Algorithmic Framework for Improving Heuristics in Stochastic, Stage-Wise Optimization Problems
… solution. However, patching is accomplished in state space, rather than in solution space. Since the proposed approach utilizes simulation with heuristics to circumvent the curse of dimensionality of the DP, it is named as Dynamic Programming in Heuristically Restricted State Space. The proposed …
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